Thanks again for the kind comments everybody! As you can see from this side view, the vessel is quite large. Assuming one of the two 24-deck living modules is dedicated to crew cabins, I have calculated that a crew of around 300 could easily be supported with a luxurious sized cabin for each crew member. The other living module would contain science labs, recreational facilities, medical bay, etc. The smaller module atop the bow is the command and control center. The four tall modules located in the second and third sections contain food production, atmosphere regeneration, and waste recycling systems. The power sources for the titanic vessel are two nuclear fusion reactors. The ship would need to refuel at gas giants in each system it visits. The hydrogen attraction and processing equipment would be located directly above and below the fusion reactors. The sublight drive is probably ionized plasma and the huge thrusters are probably chemically powered. The warp-jump drive is a first generation type device that most likely needs to perform many small jumps to travel the average 5 light year distance between stars in our part of the galaxy.